| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <memory> |
| |
| // template <class Alloc> |
| // struct allocator_traits |
| // { |
| // template <class Ptr> |
| // static void destroy(allocator_type& a, Ptr p); |
| // ... |
| // }; |
| |
| #include <memory> |
| #include <new> |
| #include <type_traits> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "incomplete_type_helper.h" |
| |
| template <class T> |
| struct A |
| { |
| typedef T value_type; |
| |
| }; |
| |
| int b_destroy = 0; |
| |
| template <class T> |
| struct B |
| { |
| typedef T value_type; |
| |
| template <class U> |
| void destroy(U* p) |
| { |
| ++b_destroy; |
| p->~U(); |
| } |
| }; |
| |
| struct A0 |
| { |
| static int count; |
| ~A0() {++count;} |
| }; |
| |
| int A0::count = 0; |
| |
| int main(int, char**) |
| { |
| { |
| A0::count = 0; |
| A<int> a; |
| std::aligned_storage<sizeof(A0)>::type a0; |
| std::allocator_traits<A<int> >::construct(a, (A0*)&a0); |
| assert(A0::count == 0); |
| std::allocator_traits<A<int> >::destroy(a, (A0*)&a0); |
| assert(A0::count == 1); |
| } |
| { |
| typedef IncompleteHolder* VT; |
| typedef A<VT> Alloc; |
| Alloc a; |
| std::aligned_storage<sizeof(VT)>::type store; |
| std::allocator_traits<Alloc>::destroy(a, (VT*)&store); |
| } |
| #if defined(_LIBCPP_VERSION) || TEST_STD_VER >= 11 |
| { |
| A0::count = 0; |
| b_destroy = 0; |
| B<int> b; |
| std::aligned_storage<sizeof(A0)>::type a0; |
| std::allocator_traits<B<int> >::construct(b, (A0*)&a0); |
| assert(A0::count == 0); |
| assert(b_destroy == 0); |
| std::allocator_traits<B<int> >::destroy(b, (A0*)&a0); |
| assert(A0::count == 1); |
| assert(b_destroy == 1); |
| } |
| #endif |
| |
| return 0; |
| } |